Yarder mounting



Jan. 23, 1940.

J. R. M GIFFERT 2,187,909

YARDER MOUNTING 2 Shets-Sheet 1 Filed March 8, 1937 QHorneu Jan.23, 1940. J RMCGIFFERT 2,187,909

YARDER MOUNTING Filed March 8, 1937 2 Sheets-Sheet 2 Patented l an. 23, 1940 p a I g UNITED STATES i OFFICE 1 l 2,187,9,09":. i

Clyde Iron Works, Inc., Duluth, Minn, a corpo-. ration of Maine 1 1 Application March 8, 1937, serial No. 129, 59 3 Claims. (crue -By My invention relates to an improvement in three points without creating any twisting tendyarder mountings wherein it is desired to proency upon theframe itself. i vide a means of mounting the bed of a yarder, It is, my purpose to mount the yarder frame or the like, upon a sled or other vehicle in such centrallyat one end by means of a type of uni- 5 a way that strain upon the sled will not be transversal.;joint-which,.wil1 permit free pivoting of 5 I mitted to the yarder. the frame withrespect to the cross-member of It is common practice to mount logging mathesled to which itis attached, and which will chines of various types. upon long sleds in order also permit relative rocking between the sled that they may be moved from one position to crossmember and the end of the frame. Such another. The runners used for these sleds are amounting willreadily relieve any strain which 10 usually formed of logs several feet in diameter, might be created by the raising of one runner and are often 50 or 60' in length. The runabove the other. This mounting in combination ners are connectedloy cross-members and are with the nountingon the opposite end of the braced to make them as strong as possible. The frame which permits relative longitudinal move- 16 frame or bed of the logging machine is secured ment between the runners permits free flexing of upon this sled and has in the past often been the sled with no damage to the yarder frame. bolted directly .to the sled.. It has been found, It will be understood that any relative'movement however, that due to the tremendous strains between the runners of the sled is extremely small exerted when the machine'is being moved from due tov the heavy bracing. ,l l r 20 one position to, another some strain has been These and other objects and novel features of 20 transmitted through the frame of the device my invention will be more clearly'and fully set providing a tendency to bind the shafts of the forth in the. following specification and claims.

machine in their bearings. l In the ,drawings forming apart of my speci- As thelogging machine is moved over. uneven fication: v q p v 1 I ground, one runner will oftentimes offer consid- Figure 1 is a side elevation view of a yarder 25 erably more resistance than the other causing a mountedupom a frame; which frame is secured tendency for one runner to be pulled ahead of to a heavy' eiistrueted sled. p the other. Furthermore, the obstructions over Figure 2 is p pl n V Of the yarder which the device is drawn oftentimes raises one fram n o ti upon the sled. I

0 runner above the other causing a tendency for Figure 3 is i l dp h View O e ya de the sled to distort to some extent, frame illustrating the CQllStIllCtiOll 0f the mount- It is the object of the present invention to prol v a, vide a means of mounting the frame of a yarder Figure 4,iS a Side elevation w par y n Seeor other logging machine, upon the sled in such l and take along -1 of Figure 3'. v 5 a way that the tendency for distortion will not s hisa mess-sectional View Of the yarder be transmitted to this frame. With such a conthrough my led, illustrating an end viewof the struction much of the repair work ordinarily frame o s u an ht n necessary both for the sled and for the logging Figure 6 is a c1oss:sectional view throu the machine may be avoided as slight racking or rm u in of-mvde e-i I 40 distortion of the sled will not in any way disturb Referring the w s; e ya der .A is 4 the proper operation of the logging machine. mounted upon the r B which in u is Furthermore, the tendency for the binding of Securedtoihe Sled P e t vention shafts in'a yarder or other machine is obviated resides Particularly in the iIype of ou ng s d by my construction; i v to connect the members B and C. n

It is a purpose of my invention to secure one The Sled C Comprises a pair of runners I0 end of the yarder frame to each of the sled mm which are le and which r c nected at ners in such a way that relative longitudinal Various Points h f l h the length eo by movement between these runners will not create o -m mbers ii, i2, ilhhd h runners H any twisting strain in the frame. It is a further in are Ordinarily formed of s which are hewn purpose of my invention to mount the opposite off along the upper surface l5 and the inner sur- 5 end of the frame upon a cross-arm centrally face Hi thereof as best illustratedin Figure 5 between the runners in such a way that relative of the drawings. The logs forming the runners twisting of the sled runners will not be trans- I0 are ordinarily several feet in diameter and mitted to the yarder frame. By following this are rounded at the ends I! to slide readily over 5 procedure, I am able to support the yarder from the surface of the ground.

Upon the upper surface l5 of each runner I0, I provide a pair of spaced angle members l9 and 20. These angle members I9 and 20 as illustrated in Figures 4 and 5 of the drawings, are countersunk into the runners l so that the upper surface of the flanges 2| and 22 respectively of the angles I9 and 23 are substantially flush with the upper surface I of the runners. The angles i3 and 28 also present upwardly extending flanges 23 and 24 respectively which extend upwardly from the surface IS in spaced relationship. The flanges 2| and 22 are secured to the runners H by means of studs 25 which are threaded into a bearing block 26 positioned in a slot 21 in the runners l0 provided for this purpose. The studs 25 extend through the flanges 2| and 22 and are held in place by nuts threaded on to the studs 25.

Interposed between the upwardly extending flanges 23 and 24 on each runner I0, I provide a link 23 which is pivotally mounted on a pin 30 extending through the flanges 23 and 24. This link 29 is pivotally connected to the frame B by means of a pivot pin 3| which extends through spaced partition walls 32 in the frame B.

The frame B comprises a pair of parallel I- beams 33 having end beams 34 and 33 connecting the same. The beams 34 and 35 comprise a pair of channel members 36 welded together to form a hollow beam. The partitionmembers 32 are positioned one at each end of the beam 35 and the other spaced a short distance therefrom to provide a bearing for the pin 3| on each end of the beam 35. Bracing beams 37, 39 and 4t connect the opposed sides 33 of the frame B and reinforce the same.

The beam 34 of the frame B is connected centrally to the center of the cross-member l2 connecting therunners E0. The connection between the beam 34 and the cross-member l0 comprises a plate 4| which overlies the central portion of the member I2 and which is provided with an upstanding circular ring 42 on the upper surface thereof. A disk 43 is rotatably secured within the ring 42 and is connected centrally to the plate 4| by means of a bolt 44. This disk 43 is accordingly free to rotate upon the plate 4|.

The disk 43 is equipped with a pair of upwardly extending ears 45 which are designed to extend on either sideof the beam 34 of the frame B. A pivot pin 48 extends through the ears 45 and through the beam 34 in a manner to pivotally connect the beam 34 to the disk 43. In order to reinforce the plate 4| and to provide ample bearing of this plate upon the cross-member I2, I provide a flange 41 which extends over the edge of the cross-girt or member I2. This flange 4'! is of sufficient size to be of material assistance in withstanding forward stresses exerted upon the frame B.

As will now be clearly understood the frame B is supported at one end entirely by means of links 29. This-end of the frame B is held from side movement by the engagement of the frame B against the upstanding flanges 24 of. the angle members 23. Figure 1 of the drawings shows the yarder A connected on the frame in such a way that the winding drums are more closely positioned to the end of the frame B supported by the links 29. While this is not essential to my invention, it will be understood that the lines from the winding drums often extend through pulley blocks mounted upon masts high in the air, and the links 29 pull upwardly upon the sled C. When one runner I0 moves slightly in advance of the other during movement of the sled, the links 29 pivot slightly to prevent any strain upon the frame B. The frame B is held from longitudinal movement with respect to the sled l3, entirely by the connection between the beam 34 and the cross-member 2. Any angularity of the crossgirt |2 caused by the movement of one runner Ill ahead of the other, merely tends to rotate the disk 43 with respect to the plate 4|. Any tendency for one runner to raise above the other merely pivots the beam 34 upon the pivot pin 46. The frame B is, therefore, supported in such a way that twisting in either direction cannot be transmitted to the frame B. All danger of causing the shafts of the yarder to bind is in this way eliminated.

In accordance with the patent statutes, I have described the principles of construction and operation of my yarder mounting and while I have endeavored to disclose the preferred construction thereof, I desire to have it understood that this is only illustrative of a means of carrying out my invention and that obvious changes may be made within the scope of the following claims without departing from the spirit of my invention.

I claim:

1. A frame mounting in combination with a substantially horizontal elongated frame, comprising a pair of oppositely disposed substantially vertical links, pivotal connecting means connecting one end of said frame to said links, a base upon which said frame is to be mounted, means for pivotally connecting said links to said base, the pivots extending transversely of said frame and base, and a universal joint connecting the opposite end of said frame to said base.

2. A frame mounting forsleds having parallel runners with cross-members therebetween, including a plate overlying one of said cross-memhers, a rotatable member pivotally supported on said plate, pivot means pivotally connecting said rotatable member to one end of said frame, and substantially vertically extending link means pivoted along pivots extending transversely to said runners at one end to said frame and at the other end to one of said runners connecting said frame to each of said runners.

3. A frame mounting for connecting a frame to a sled having a pair of spaced runners and crossmembers connecting the runners, including a vertically extending member on each of said runners engageable with one end of said frame to prevent lateral movement of said frame with respect to said runners, a pair of links connecting said vertically extending members to said frame, and universal joint means secured centrally to a crossmember on said sled and centrally to the other end of said frame for universally connecting said sled to said other end of said frame.

JOHN R. MCGIFFERT. 

